Products > Test Equipment

TEKHIND 2235 (Tektronix India)

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abhi1981:
Resoldered all the dirty points. Now the scope powers on. No trace. Beam find shows a bright dot.
The focus, position and intensity seem to work.
Checked the voltages on points W961, W968, W960, W954 and W956 - all OK.
Nothing has been changed on the board. One Rifa C902 is removed.

abhi1981:
IT'S ALIVE ;D ;D

My bad. The scope settings were wrong. Just followed the instructions on this post https://www.eevblog.com/forum/repair/tektronix-2235-no-trace/  and it works.
Channel B is noisy though.

But, how it started working suddenly is till a mystery. :-// :-//

Now to change those rifas.

TERRA Operative:
For the cost of shipping, I can see what I have in my stock of parts and send them over. A small box from Japan to India shouldn't cost too much.

abhi1981:

--- Quote from: TERRA Operative on July 10, 2023, 01:20:47 am ---For the cost of shipping, I can see what I have in my stock of parts and send them over. A small box from Japan to India shouldn't cost too much.

--- End quote ---
That's very kind of you Terra, but please don't send anything. The international postal services is very bad here. The package will surely be lost in transit.

Regarding the replacement for the rifas, should the capacitance be exactly the same or a higher value can be used.

TERRA Operative:
It should be as close to original as possible, but a slight variation in capacitance wouldn't be terrible.
More important is that you don't use a lower voltage rating, but higher is fine (and potentially better for longer life).

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